On Tue, May 4, 2021 at 07:20 AM, Kokoro San wrote:
another one is G8 with 180 teeth + gear reduction 150:1That is your problem: extremely high gear reduction.
I also have a mount with a 180 worm wheel (Vixen SXD), and use 200 step motors
with 18:1 gear reduction.
My spreadsheet is like this:
200 step, 1/32, 18:1, 180 = 57600 steps per degree.
This is close to the 61,200 recommended limit.
For you to get that, you need:
200 step, 1/4, 150:1, 180 = 60000 steps per degree.
If you use a TMC StepStick it will do interpolation of microsteps, and 1/4 may work.
So the TMC5160 should work, in theory.
But per the spreadsheet, at 3 deg/sec slewing, the motors are doing 13,500 RPM, and
would most likely stall at this speed. Reducing the slewing speed to 1 deg/sec makes
it 4,500 RPM. Maybe that would work.
But you are certainly better off with less reduction. Somewhere between 10:1 to 15:1.